| 1. | How to measure the current in a low stray inductance dc bus design
如何在母线电感很小的情况下测量电流？ |
| 2. | The spwm control has a good waveform but the dc bus voltage utilization is low
Spwm控制波形质量好,功率管开关频率低但直流电压利用率低。 |
| 3. | The 7 years ' applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances
7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。 |
| 4. | The hardware design includes these main circuits such as current sensing , dc bus voltage sensing , space - vector pwm waveform generation , the system protection and so on
在硬件实现中，重点讨论了电流、电压、速度检测单元以及pwm发生单元和系统保护功能等。 |
| 5. | Abstract : a new kind of variable frequency speed - governing experiment system which has the structure of two parallel inverters at dc bus and output of inverter driving two series asynchronous motors at the same shaft is presented in this paper
文摘:提出了一种双逆变器直流母线并联、变频输出驱动同轴串联的两台异步电动机结构的新型变频调速实验系统。 |
| 6. | The problems such as the circuit and the working mode of the pwm dc / dc modules , the configuration of the parallel connection , the usage of the input dc bus , and the system control strategy were analyzed and discussed as well
论文对pwmdc dc电源的电路结构和工作模式、并联系统的结构、是否采用直流输入母线、以及系统的控制方案等问题进行了分析和讨论。 |
| 7. | With an aim at this problem , this paper suggests the modulation scheme with dc bus voltage ripple by using the front - end active power factor correct circuit based on the analysis of necessary conditions of producing acoustic resonances
针对这一现象，在分析产生声谐振的必要条件的基础上，重点提出了利用前级有源功率因数校正电路的直流母线脉动电压的调制方案。 |
| 8. | Space vector modulation technology with many advantages relative to spwm , such as nice dynamic response ability , high utilization ratio of dc bus voltage , and convenience of composing digital control system , is adopted to control the asvg
由于电压空间矢量调制（ svpwm ）具有动态响应速度快、直流侧电压利用率高以及便于数字化控制等优点，故以此作为asvg的控制方法。 |
| 9. | The conventional rectifiers produce harmonic problem in power system . while three - phase pwm voltage source rectifiers ( vsr ) can provide constant dc bus voltage and get low harmonic distortion of input current . it also has line power feedback capability
传统的整流装置是电网污染的主要来源，三相电压型pwm整流器具有输出电压恒定、能实现单位功率因数运行的特点，甚至可以实现电能回馈电网。 |
| 10. | The inverters based on space - vector pwm technique have many good qualities , such as less pulsating torque , higher usage of dc bus voltage , less switching loss , better high - speed regulation performance , so it is applicable for the high - performance motor control system
电压空间矢量pwm技术( svpwm )将逆变器和电动机视为一体，由之控制的变频器具有输出转矩脉动量低、直流电压利用率高、开关损耗小、高速调速性能好等优点，适用于高性能电机调速控制系统。 |
